Floor-plate for furnaces



(No-l Model.)

E. Bf. GOXE.

PLODR PLATE PGR FURNAGES. No. 510,576. Patentd Dec. 12., 189s.

G/ l @i Q @TQQ Y df@ QV d@ @ifa UNITED STATES PATENT OFFICE.

ECKLEY COXE, OF DRIFTON, PENNSYLVANIA.

FLOOR-PLATE Fo'R Fu RNAcEs.

SPECIFICATION forming part of Letters Patent No. 510,576, dated December 12, 1893.

Appiicaimi ined Juiy 15, 189s. seria No, 480,620. (Norman.)

To @ZZ whom it may concern:

Be it known that I, ECKLEY B. COXE, a citizen of the United States, residing at Drifton, 1n the county of Luzerne and State of Pennsylvania, have invented certain new and useful Improvements in Floor-Plates for Furnaces, of which the following is a specification.

This invention relates to grate-bars, of the floor-plate class, for furnaces; the object being to furnish an improved double-plate furnace-floor in which the upper plate or iioor shall consist of renewable sections removably fixed to the lower plate of the furnace-door.

I My present improvements are especially designed for use in traveling-grate furnaces of the general class describedin the Letters Patent No. 499,716, granted to me June 20, 1893,

and are more particularly applicable to the improved furnace of said class which is described in my prior application, Serial N o. 447,264, tiled June 12, 1893. In the drawings accompanying and formlng a part of this specification, Figure 1 is a plan view of a portion of a furnace-door sectlon embodying my present improvements. Fig. 2 is a side elevation of the parts shown 1n Fig. 1. Fig. 3 is a sectional end elevation of a pair of adjacent floor-sections such as are illustrated in Figs. l and 2. In each of the figures of drawings, some of the parts are shown broken away for more clearly illustrating the construction and arrangement of the same.

Similar characters designate like parts in all the figures.

The improved grate-bar or floor-section herein described consists of two parts, 'the lower plate, and an upper plate removably supported on and free of the lower plate. The lower plate is vshown continuous, and formed on the upper edge of a beam or bar N, which is, in practice, and as indicatedin Figs. 2 and 3, adapted to be carried by suitable car'- ryingchains indicated in Fig. 3 and more fully shown in my aforesaid Letters Patent and prior application. The lower plate 2 of the licor-section is shown constructed with a numberof perforations, which,in the present instance, (as most clearly illustrated in the middle portion of Fig. l) are regularly arranged in rows longitudinally and also transversely of the Hoor-plates; but it will be understood that other arrangements of said openings may be used; also, that the openings maybe of various spherical outlines, and of varying sizes relatively to a given standard and to each other. The upper plate is shown formed in sections, in the present instance approximately square, which sections are set upon the lower plate contiguous to each other,

Vas indicated in Fig. 2,and are held in place by suitable attaching-devices. The upper plate is supported on the lower plate at some distance above, or free of, the same, approximately as indicated in Figs. 2 and 3, by means of depending studs or posts, 5, whose reduced lower ends tirare, preferably, constructed as indicated in the drawings, to engage in corresponding holes in the lower plate. By this means the upper plates are each held independently of the other, and also independently of their fastening devices, in proper position longitudinally and laterally of the floorsections; so that any one of the several upper plates may be removed and replaced independently of the other upper plates. In the left-hand portion of Fig. l, the supportingposts of the upper plate G are indicated by 5, 5', and 5, respectively; and said posts are located on the under side of the upper plate at points between the openings 7 of the upper plate, so as to come in alignment with the corresponding holes of the lower plate; a set of these holes are designated, in the middle portion of Fig. 1, by 11, 1l and 11, respectively.

The set of supporting studs or posts 5, 5 and 5, for the upper-plate are shown located in the form of a triangle which is not an equilateral triangle, (see Fig. 1,) so that said plate is not reversible, but will only engage on and with the lower-plate in one position relatively thereto.

Each of the upper plates is furnished with one or more fastenings, which, in the preferred form thereof herein shown, consist of a rod, 10, preferably secured in the upper plate by means of its head 12, Fig. 3. Said rod may be so fixed in the plate after the well-known manner of fixing a rod in a casting by setting the headed end thereof within the mold and casting the article over the head. In Fig. l, the plate G is shown provided with two such fastening-devices, indicated by dotted lines and designated by 10 and 10", respectively. These fastening devices are shown located in coincidence with the openings 4 ande of the lower plate 2, so that on setting the upper plate G in proper position on the lower plate, the supporting-posts of such upper plate engage 1n corresponding openings, and the fastening-rods extend downwardly through the proper openings of the lower plate, ready to be'bent over by means of a hammer or other suitable instrument t0 form the holdin g-hooks 1o, as indicated in Figs. 2 and 3, for securely retaining the upper plates in place.

For removing the upper plates, it is only necessary to properly apply a suitable chisel or llike instrument to the hooks 15 for straightening out the same; which being done, the plate is free to be removed for repairs or renewal as the case may be.

The distance at 13 between the lower and upper plates of the Hoor-section should depend upon the size of the fuel to be used; in practice, and for burning the finer, or buckwheat, sizes of anthracite coal, I prefer to make said space about one-fourth of an inch in depth. My present invention is in the nature of an improvement on the grate or furnace-floor described and claimed in my application, Serial No. 479,987, filed July 10, 1893.

Having thus described my invention, I claimm 1. In a furnace Hoor-section of the class Specified, the combination with the lower plate having suitable openings, of the removable upper plate, one of said plateshaving posts for supporting the upper plate at a distadce above the lower plate, and a malleable fastening-rod fixed in one of the plates and extending through perforations in the other plate and adapted to be bent to form a retaininghook for holding the removable plate in place, substantially as described.

2. The improved furnace door-plate herein described, it consisting in a perforated plate having fixed therein malleable fastening-rods adapted to be bent to form retainining-hooks, substantially as described.

3. The improved furnace Hoor-plate herein described, it consisting of a perforated plate provided with supporting-posts constructed for engaging in the openings of a floor-section and having a multiplicity of fasteningrods fixed in the plate and adapted to be bent to form retaining-hooks, substantially as and for the purpose described.

ECKLEY B. COXE.

Witnesses:

STEWART F. MACFARLANE, ELLIOTT A. OBERRENDER. 

